Question

What is the molecule name of this bond line formation

Answer 1

The molecular name is –

$<b><h3>Penta-1,3-diene</b></h3>$

IUPAC Name –

$<b>Word Root + Position + Suffix</b>$

This comound belongs to Alkene Family.
Therefore, Suffix = $<b>ene</b>$

The longest carbon chain is of 5 carbons.
So, $<b>Word Root = Pent</b>$

There is more than 1 double bond.

So, Pent becomes $<b>Penta</b>$.
Also we use $<b>di</b>$.

According to $<b>First Rule</b>$ both the double bond should be provided the lowest possible position.

Now, If we start numbering from the Right side, the double bonds get the position = 2, 4.

If we start numbering from the Left side, the double bonds get the position = 1, 3.

Position 1, 3 is correct.

Therefore

The IUPAC name becomes Penta-1,3-diene.